I built mine not feeling a need for an EXACT clone. Here is what I built....
Specs:
RRA Lower + LPK
WOA A4 Upper
WOA Stainless 18" 1/7 SPR Barrel KG Koted black
WOA Bolt Carrier group
Phantom 5C2 Supressor/Comp ($22 vs $100 for Ops Inc)
PRI Gen 3 Carbon Fiber handguard
ARMS #38SPR PEQ2-3 top rail
YHM Flip up front site/Gas block ($80 vs $180 for PRI0
ARMS #40L Rear BUIS (*Thanks to Gun Gallery)
DPMS Panther grip
ARMS Harris bipod mount + Harris bipod
A2 Buttstock
Still waiting to get my ARMS #22 rings for my ATN 5x33 scope.
I saved quite a bit of money on items that were "functionally" the same.
I'm not a scope snob. While I appreciate Leoupold quality, it's not a must have.
(That is a BSA 4-16x40 Illuminated Mil-dot scope I had in the safe.)
Most of my parts came from ADCO.
The rifle looks and shoots fantastic!